Solderless seam for sheet-metal vessels.



No. 818,438. PATENTED APR. 24, 1 9 06.

' '0. HEINDORF.

' SOLDERLESS SEAM FOR SHEET METAL VBSSELS.

* APPLIOATION IILED KAR.18,1905.

a e A/ a e h/ 1: d z l d &

WITNESSES: INVENTOR,

ATTORNEYS.

OSCAR HEINDORF. OF LONDON.

MESNE ASSIGNMENTS, TO JOHN ENGLAND, ASS'IGNOR, BY DIRECT AND MURPHY, OF BROOKLYN, NEW YORK.

SOLDERLESS SEAIVI Fon SHEET-METAL VESSELS- Specification of Letters Patent.

' Patented April a4, 1906.

Application filed. March 18,1905. Serial No. 260.801-

To all whom it may concern:

Be it known that I, OscAR HEINDORF, a subject of the King of Great Britain, residin in the city of London, En land, have invente certain new and usefu Improvements in Solderless Seams for Sheet-Metal Vessels; and I do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as will enable otihers skilled in the art to which it appertains to make and use the same, reference being had to the accompan ing drawings, and to letters of reference mar ed thereon, which form a part of this specification.

My invention relates to folded or look seams for sheet-metal vessels, and particularly to seams of this kind having curved or otherwise continuous form and employed as the joint between the body and head of a vessel.

My invention has for its object to provide a hermetically-tight joint or seam with the minimum layers, thus saving metal and wear and tear on the machinery and augmenting the rapidity of the output.

My invention will be found fully illustrated in the accompanyingdrawings, wherein Figure 1 is a view, partly in side elevation and part1 in section, of a can body and head assemble ready for the operation involved in producing the hermetic joint or seam. Fig.2 is a similar view showing the condition of the parts after the first step in this operation. a Fig. 3 is 'a sectional view showing the condition of the parts after the second step in said operation; and Fig. 4 is a view similar to Fig. 3, showing the condition of the parts after the third step. The seam or joint is perhaps best described with reference to the operation of making it.

a is the body of-the can, and 1) its head. The head is of that type wherein the perimeter portion 0 projects upwardly out of the plane of the body portion d thereof. In the present instance it stands at right an les to the body portion (1 of said head and as its edge rebent downwardly, Fig. 1. formed, the head and body are assembled by fitting the end of the bodya into the rebend of the head, so that the end or'edgeportion of the body and the rebent perimeter portion of the head form three concentric layers e, f,

Thus

and g, together making a flange h on the can. A continuous groove '11 is now formed 1n this flange in one plane and another continuous groove 7' formed therein in another plane, said grooves being the one inside and the other outside of the flange. This grooving is of such character that it preferably aflects-all the thicknesses of the flange involved, making thus a bead lc (Z) for each groove on the opposite surface of the flange. Having thus grooved theflange, its extremity is bent outwardly to produce a reinforcing bead or rim m, which both gives strength and a finish to the can and joint against t e eflects of blows or ars. The

ooving, it will be observed,has the efiect of, in the one instance, ex anding the flange for a limited width annular y or continuously and of, in the other instance, similarly contractin 1t.

a is preferred that the groove 9', which is formed in the outside of the flange, be above the roove 'i, which is formed in the inside of' in s. %It will be observed that the oove '1' is shown as dipping down below the evel of the body ortion d of the head I). This is not essentia in the broad aspect of my invention; but it is of considerable importance and value, in that thus the metal is crowded or forced downwardly to meet the adjacent end of the side seam of the vessel, and thus close off any opening which would otherwise exist at this point.

Havmg thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A sheet-metal vessel having the edge portions of its body and head arranged as concentric layers and thereby forming a flange on said vessel, said flange being continuously or annularly grooved and thus expanded in one portionand continuously or 5- reserves the'integrity of the ortions of the annularly contracted in a portion above and remote from the aforesaid portion, substantially as described.

2. A sheet-metal vessel having the edge portionsof its body and headarranged as concentric layers and thereby forming a flange on the vessel, said flange being continuously or annularly expanded in one plane and continuously or annularly contracted in anotherplane and having its edgeportion bent over to form a rim or bead, substantially as described.

3. A sheet1netal vessel having the edge portions of its body and .head arranged as concentric layers and thereby forming a flange on said vessel, said flange being continuously or annularly expanded in one plane and continuously or annularly contracted in l a plane above the aforesaid plane of expan-.

tinuously grooved on the inside an fsaid' groove beingdepressed below the level of the body portion of said head, substantially as described.

In testimony that I claifii the foregoing I have hereunto set my hand this 24th day of February, 1905.

OSCAR HEINDORF.

Witnesses:

WM. D. BELL; JOHN W. STEWARD. 

